Front Ball Joint Inspection

Special Tools 

J 8001  Dial Indicator Set

IMPORTANT:
• The vehicle must rest on a level surface.
• The vehicle must be stable. Do not rock the vehicle on the floor stands.
1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Clean and inspect the ball joint seal for cuts or tears. If the ball joint seal is damaged, replace the ball joint. Refer to Lower Control Arm Ball Joint Replacement .
3. Support the lower control arm with a floor stand as far outboard as possible and raise the suspension to just below ride height.
Fig 1: Measuring Vertical Lash In Ball Joint
Courtesy of GENERAL MOTORS COMPANY
4. Install J 8001  Dial Indicator Set or a suitable dial indicator in a way to measure vehicle lash in the ball joint.
IMPORTANT:

Do not pry between the lower control arm and the wheel drive shaft boot.

5. Gently lift or pry the suspension to induce ball joint movement.
6. If the dial indicator reading is more than 0.5 mm (0.020 in), replace the ball joint. Refer to Lower Control Arm Ball Joint Replacement .